<!DOCTYPE html>

<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>作业</title>

    <style type="text/css">
        .wrapper {
            width: 100%;
            height: 1500px;

        }

        .first {
            background: url(liuyifei.jpg) left top no-repeat ,
                url(liuyifei.jpg) 290px 290px no-repeat ,
                url(liuyifei.jpg) 580px 580px no-repeat ,
                url(liuyifei.jpg) 870px 870px no-repeat ;
        }
    </style>

</head>

<body>
    <!-- <div class="wrapper"></div> -->
    <div class="wrapper first">
        <!-- 在这个元素的四个角落使用不同的背景图像。 -->
    </div>

</body>

</html>